I do notice that your standard deviation is 20 some percent of the mean, which is a fairly large size. This means that your test scores were "scattered" a bit: you were not consistent on your exams. As to the meaning that can be ascribed to this I cannot say. That rather depends on the stats your classmates had as well. (It could be a sign that, for example, the tests themselves were not written with a consistent level of difficulty.)
Personally I wouldn't worry about it too much.