Has a FIBA World Cup game ever ended 89-68?
Exactly once. On August 31, 2014, Slovenia beat Mexico 89-68, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 89-68 in league history.
That makes 89-68 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 90-68 has happened never and 89-69 has happened 1 times.