Coronary Heart Scan Result: input requested

Someone close to me:  Male 45 had a coronary artery scan.  He exercises everyday, is in great shape, and is not overweight, etc.    His result was a 109 with an 87% percentile.

After doing some reading, it seems that this is a very high percentile rank and means his risk for future heart attack is very high..... like 30% in the next 10 years.   Is that true?  I'm concerned.

What is the significance of the this test result and its associated risk profile.  It seems quite concerning....  (He will ultimately see an cardiologist, but please give me some perspective on this.)   I have not seen any information to the contrary on the risk associated with this percentile rank, so it seem credible.  For instance, does it matter which arteries etc...

Thank you in advance!