I got some cedar arrows fully fletched from my buddies basement but they fly to the right. Does this mean they are to stiff?

Do they hit to the right or do they fly nock right?

If they hit to the right ,could be. It could also be a tuning issue. Having the specs of your bow and the spine, length of the arrows, and your draw length would be helpful.

If they are flying well, but striking right, they are not too stiff, they are too limber.  You can compensate by building the arrow rest out a bit, that should do the trick.  If you move the rest and they hit okay but whip off the bow, then don't use them, as they may be much too limber for safe shooting.

What George said.

Generally if they're hitting right that would suggest they are weak, unless you are left handed, in which case that would be stiff. They can also be too stiff and act weak or too weak and act stiff.  There are other tuning and form issues that can cause right hits too.

The way I always remember it is a rhyme Right is Light.

Shooting off the shelf?

Let's get to the basic's here! we are assuming you are Right handed. Are you shooting LB or recurve, not that it matters much. How many arrows do youhave of that bunch? What is your draw length and how long are the arrows???