The winner was Sweden with the song "Diggi-Loo Diggi-Ley", composed by Torgny Söderberg, written by Britt Lindeborg and performed by the group Herreys.

[6] The theatre's main auditorium usually holds an audience around 950 people, however this was reduced with the addition of technical equipment and commentator's boxes.

[2] As a result, only press, members of each country's delegation and diplomatic representatives were allowed to watch the live show at the venue.

Israel declined to enter as the date of the contest coincided with Yom HaZikaron, while Greece, which had originally planned to participate in the contest, reportedly withdrew its planned participation as the quality of the songs submitted to the Greek broadcaster for consideration was deemed to be of too low a quality.

Germany's Mary Roos had finished third in 1972 and made a second appearance for the country in 1984;[7][8] Izolda Barudžija, who had been a member of the group Aska that represented Yugoslavia in 1982, participated again this year alongside Vlado Kalember;[9][10] Kit Rolfe, lead singer of the United Kingdom's Belle and the Devotions, had previously performed in the 1983 contest as a backing vocalist for the British entry Sweet Dreams[11][12] and Gary Lux, who had represented Austria in 1983 as a member of the group Westend, returned as a backing vocalist for the Austrian singer Anita.

[7] On behalf of the contest organisers, the European Broadcasting Union (EBU), the event was overseen by Frank Naef as scrutineer.

[25] The points awarded by each country were determined by an assembled jury of 11 individuals, who were all required to be members of the public with no connection to the music industry, with a recommendation that there should be a balance between the sexes and that half should be under 25 years old.

The votes of each member were collected following the country's performance and then tallied by the non-voting jury chairperson to determine the points to be awarded.

In any cases where two or more songs in the top ten received the same number of votes, a show of hands by all jury members was used to determine the final placing.

For the 1984 contest, de Groot's design centred around various shapes which were suspended over the performance area on a series of pulleys and which could be moved around the stage in between the competing acts; this allowed for different backdrops to be created for each entry.

Various reasons for the booing have been proposed: these include being a response to football hooliganism which occurred in Luxembourg by English football fans during the qualifying stage of the 1984 European Championship, the use of off-stage backing vocalists during the UK's performance which gave an impression that members of Belle and the Devotions were lip syncing, and allegations that their song, "Love Games", which was heavily inspired by 1960s Motown tracks, had plagiarised previous tracks by the Supremes.

[26][39][40] During the traditional winner's reprise performance, the group sung part of the winning song in English, with lyrics written by Per Herrey.

[23] Broadcasters were able to send commentators to provide coverage of the contest in their own native language and to relay information about the artists and songs to their viewers.