You can describe someone as a right-hander if they use their right hand rather than their left hand for activities such as writing and sports and for picking things up.
right-hander in British English
noun
1.
a blow with the right hand
2.
a person who is right-handed
Examples of 'right-hander' in a sentence
right-hander
His awareness of his off stump for a right-hander is particularly good.