mast rake vs weather helm

[louismolly]

I have always had a lot of weather helm on my Passport 43. A rigger working on another boat looked over and said my mast was raked at least 3 degrees aft which he said would explain it. Is this right? If so, and I wanted to straighten the mast, what would be the procedure. I have a Harken furler on the forestay which hides the turnbuckle. Upper, middle, and lower shrouds. Backstay is not adjustable.