Has a FIBA World Cup game ever ended 79-55?
Exactly once. On September 2, 2014, Mexico beat Angola 79-55, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 79-55 in league history.
That makes 79-55 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 80-55 has happened 2 times and 79-56 has happened never.