For his performance in which film did F. Murray Abraham win the 1984 'Best Actor' Oscar?

F. Murray Abraham (born Murray Abraham; October 24, 1939) is an American actor. He became widely known during the 1980s after winning the Academy Award for Best Actor for his role as Antonio Salieri in Amadeus (1984). He has appeared in many roles, both leading and supporting, in films such as All the President's Men (1976), Scarface (1983), The Name of the Rose (1986), Last Action Hero (1993), Star Trek: Insurrection (1998), Finding Forrester (2000), Inside Llewyn Davis (2013) and The Grand Budapest Hotel (2014). He is also known for his television and theatre work and is now a regular cast member on the award-winning television series Homeland.

Amadeus is a 1984 American period drama film directed by Miloš Forman, adapted by Peter Shaffer from his stage play Amadeus. The story, set in Vienna, Austria, during the latter half of the 18th century, is a fictionalized biography of Wolfgang Amadeus Mozart. Mozart's music is heard extensively in the soundtrack of the movie. Its central thesis is that Antonio Salieri, an Italian contemporary of Mozart is so driven by jealousy of the latter and his success as a composer that he plans to kill him and to pass off a Requiem, which he secretly commissioned from Mozart as his own, to be premiered at Mozart's funeral. Historically, the Requiem, which was never finished, was commissioned by Count von Walsegg, and Salieri, far from being jealous of Mozart, was on good terms with him and even tutored his son after Mozart's death.