Has a FIBA World Cup game ever ended 84-82?
It has. 84-82 has been a FIBA World Cup final 3 times in 1,208 games. The first was Mexico beat Argentina on May 14, 1963; the latest was Serbia beat Argentina on September 2, 2010.
That makes 84-82 the 26th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 85-82 has happened 2 times and 84-83 has happened never. At one point the score disappeared for 35 years, between 1963 and 1998.