Has a FIBA World Cup game ever ended 90-85?
It has. 90-85 has been a FIBA World Cup final 4 times in 1,208 games. The first was Brazil beat Poland on June 6, 1967; the latest was Serbia beat France on September 12, 2014.
That makes 90-85 the 6th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 91-85 has happened never and 90-86 has happened 1 times. At one point the score disappeared for 27 years, between 1967 and 1994.