The description of the Melf's Minute Meteors spell states, in part:
[...] you can expend one or two of the meteors, sending them streaking toward a point or points you choose within 120 feet of you. Once a meteor reaches its destination or impacts against a solid surface, the meteor explodes. Each creature within 5 feet of the point where the meteor explodes must make a Dexterity saving throw. [...]
This seems like a fairly easy ruling for when choosing a point, choose a point in between four squares and any creature in those four squares need to make a saving throw like so:
However, how does this interact if if impacts a singular creature in the middle of a square? Does only that creature make it because only that creature is fully within 5 feet, or do the creatures in the 8 surrounding squares also need to make it (reference pics below)?