Shoaff was president and board chairman of the Nutri-Bio Corporation, a Multi-level marketing organization which sold vitamin, mineral, and protein dietary food supplements.
Shoaff was influential in the early career of Jim Rohn, another American entrepreneur, motivational speaker and writer.
During World War II Shoaff was not able to enlist due to his heart condition, and instead worked overseas as a medical volunteer with the American Field Service.
In 1950, Shoaff and his wife decided to sell the dry cleaning business and move with his parents to Long Beach, California.
The company grew to six million dollars per month in sales with 115,000 distributors in the USA and Canada, and Shoaff became a multi-millionaire.