You weigh about the same as I. One important question is whether you have the chute or not. You need to take into consideration the conditions you sail in as well. Mast rake will affect your pointing ability as well as the weather helm you have. As a general guideline, I would say rake it back depending on the amount of weather helm you have. The further back you rake it, the more weather helm you will have. Take your boat out for a day and play with it. If you have lee helm, a bad thing in my opinion, rake it back one hole at a a time until you have a neutral helm. I believe in having a slight amount of weather helm in case the skipper falls off.
As mentioned, also affecting the amount of rake you want is whether you have a chute and the conditions you sail in. I have a different answer if you have a chute. Where are you located?