as above said 69 is the max and 63-65 at load depending on room temp and ventilation.
normally i would suggest that you get a 3rd party cooler if your worried about temps, but its an old cpu and its likely that its welded to the hsf with a ceramic tim so the best you can do is make sure the hsf is clean and well ventilated you may be able to swap out the hsf fan for a stronger 1 but its a lot of effort for such an old part.