Could Elevated Levels Of Cholesterol Be A Matter Of Concern?

hi, just had a check up and whilst BP is fine, active, ex smoker (9months free) and BMI of 24.2 - my cholesterol was high - total 6.15 - TC/HDL of 7.3 - I know this is high and my risk rating is 11% so moderate - should I be worried? I appreciate I need to alter my diet a little and do more exercise... any thoughts (I m 44 / male)