If you are unsatisfied with your stat allocation, you are able to reset it in each area's tavern/inn. Example is Chief Merrick as shown at the image below:
Talking to him will give you the option to reset your stats as shown here:
Tapping on that will allow you to reset your stats but it will costs gems to do so.
NOTE: The initial cost for resetting stat points is 50 gems and the cost will increase with successive stat reallocation.