Mr. Horn was awarded his diploma with the Class of 1944, his wife, Naomi, said.
He was a radioman on a light cruiser in the South Pacific during World War II and ended his Navy career in the Aleutian Islands in 1953.
Later in the 1950s, he was one of four owners of Marianne Lumber, a contracting firm in Marianna, Washington County, Pa.
Mr. Horn moved to Riverton in 1960 and joined the Collins firm there.
From the 1980s into the 1990s, he was a troubleshooter and maintenance man for MAMCO Property Management in Woodbury Heights, his wife said.
The couple used a 31-foot motorboat in the Delaware and Chesapeake Bays, she said. Mr. Horn was a Mason.
Besides his wife of 64 years, he is survived by his caretaker of the last three years, Emmanuel Goce.
A viewing was set from 7 to 9 p.m. Friday, Oct. 25, at the Weber Funeral Home, 112 Broad St., Riverton. A second viewing is to be from 9:30 to 10:30 a.m., Saturday, Oct. 26, at Asbury United Methodist Church, 2492 Andover Rd., Cinnaminson, before a funeral there at 10:30 a.m., with burial at Lakeview Memorial Park.
Donations may be made to the South Jersey Chapter of the Alzheimer's Association, Suite 7, 11000 Lincoln Dr. West, Marlton, N.J., 08053.
Condolences may be offered to the family at Weber Funeral Home, 112 Broad St., Riverton, N.J. 08077.