swapping columns on imported data

hello, i have a coursework question which needs me to organise my data imported from excel into ascending rows, where each row is also ascending. Its for pythagorian triples but for some reason itll give me the rows ascending but each row will have the largest number in the middle column not the last one. For example its giving me 3 5 4 instead of 3 4 5 like i want.

[Walter Roberson]

Hint: sortrows()