Has a FIBA World Cup game ever ended 76-68?
Exactly once. On August 20, 2006, Turkey beat Australia 76-68, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 76-68 in league history.
That makes 76-68 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 77-68 has happened never and 76-69 has happened 3 times.