Those arrows mark how many times to turn the dial and what direction.So the >> means turn to the right and stop when the next number hits the mark the second time.Does that clear things up somewhat?
That's right-for some reason they used Roman numerals for numbers over 9.So your combination should be start at 9,turn right twice stopping on 2,back to the left twice stopping on 19 (V is 5 so 5+5+9),then right twice stopping on 8.The safe should now open.
thanks alot guys that one was driving me crazy. when i started the game i put the riddle difficulty on hard because i wanted a challenge but i didnt think it would be this hard