Has a FIBA World Cup game ever ended 78-72?
Exactly once. On July 29, 1998, Greece beat Canada 78-72, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 78-72 in league history.
That makes 78-72 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 79-72 has happened never and 78-73 has happened 1 times.