Has a FIBA World Cup game ever ended 79-51?
Exactly once. On August 2, 2017, Austria beat Albania 79-51, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 79-51 in league history.
That makes 79-51 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 80-51 has happened never and 79-52 has happened never.