Hey —!
Here's what the manual states about the Sort action:
Sort
Sorts the order of elements on an axis in ascending order. Note that in multidimensional arrays this sorts based on the first element on the axis. For example sorting the X axis in a 2D array will sort the order of the columns based on the elements at Y co-ordinate 0, while preserving the contents of each column.
So, if you want to sort by score, just change the order of columns in your array. Also, I'd suggest you make your array ?? x 3 x 1...
Hope this helps. Cheers!