So, for example, the array has two rows - first contains enemy types (zombie, goblin, skeleton), and the second row contains the amount of points. Is this correct?
Then you need to loop through the array searching for enemy type. Or use array.indexof() expression:
Add Array.at(Array.indexof("zombie"),1) to Score
This may be easier to do with a dictionary instead of the array. Then you simply use Dictionary.Get(enemytype) to get the number of points.
You can store the enemy type in an instance variable on the sprites.