After you get the arm to the length you want, you could short row to get it to turn right.
Here's a dish cloth pattern I like that is done with short rows, you would just do one repeat to make a right hand turn.
if you go here and look at the right menu bar it says 4 corners discloth. Its a word doc download. you would follow one repeat, or as how many stitches you have.
That should give you a right hand turn.