If it is very high, then I suggest he takes the lipitor, if not, then a strict healthy diet can be as good.
Blood pressure is another key factor in the buildup of plaque, it must be kept normal which again may take medication such as ace inhibitors. There are other risk factors which must be addressed, such as no smoking, avoiding as much stress as possible and regular exercise. Anything above 70% is seen as severe so your husband is on the borderline and can be controlled with medication.