65-70 is a warmer range for the notebook, but not out-of-bounds. Laptops are not like desktops. Their fans do not run all the time, to save power - they only cool the CPU enough to let it warm up again (a homeostasis cycle, if you remember bio)
It's possible the high temps are from a clogged up heatsink. I suggest you take an air compressor and blow out the dust bunnies on that machine...it's several years old, there should be quite a bit in there.