It's not that easy...

Unfortunately, your answer is wrong.
You should only be able to see a maximum of 12 dots because there are only six "real" ones. Therefore only six dots can be reflected and you should be able to see 12 dots in total (image blow)).

With the mirror you can depict all numbers of dots from 1-12. You should have experienced that the uneven numbers where the hardest to depict. The examples below illustrate how to depict the numbers 1, 3 or 5.

By the way:
How can you rearrange the mirror in order to see no dots at all?