"right arm pain"
When does this manifest itself...all the time, when he makes certain movements of his arm or when he walks or moves?
How long does the pain last, if it is a matter of a minute or two and then goes away on it's own or relieved by rest, then that would be significant.
The nature and character of the pain is all important.
Cardiac pain radiating down the left arm is not as common as people think and certainly pain radiating down the right arm from the heart is very uncommon.
If he is taking beta blockers (e.g Bisoprolol) then it is extremely common to "feel cold".
From where I am sitting there is nothing to worry about, but if HE is worried, then get it checked.