He may have just finished climbing a mountain/wall. Or less common you might see it referring to comparative order, such as in sports. For example: "Tiger Woods began the 18th hole at the bottom of the group. He arrived at the top"
I put "He made it to the top," which at least Reverso seems to indicate is ok (it's actually the first alternative listed). It was counted wrong and "He gets to the top" offered as the correct alternative. Any explanation for that? The tense doesn't match.