List of Famous people who died at 84

Denis Farkasfalvy was a Hungarian-American, Catholic priest and monk of the Cistercian Order. He was an abbot, theologian, author and translator.

Boyce Dawkins McDaniel was an American nuclear physicist who worked on the Manhattan Project and later directed the Cornell University Laboratory of Nuclear Studies (LNS). McDaniel was skilled in constructing "atom smashing" devices to study the fundamental structure of matter and helped to build the most powerful particle accelerators of his time. Together with his graduate student, he invented the pair spectrometer.

Phoumi Vongvichit was a leading figure of the Pathet Lao and an elder statesman of the Lao People's Democratic Republic.

Hubert Prior Vallée, known professionally as Rudy Vallée, was an American singer, musician, actor, and radio host. He was one of the first modern pop stars of the teen idol type.

Gunnar Helén was a Swedish liberal politician. He was party leader of Liberal People's Party 1969–1975, Governor of Kronoberg County 1965–1970 and of Stockholm County 1977–1984.