if i got applecare and my iphone x fall and screen is crack how can i get it fix

iPhone Repair - Screen Damage [and links to other iPhone repair services] - https://support.apple.com/iphone/repair/screen-damage - includes pricing.

Screen damage is not covered by the regular warranty. If you have Applecare Plus you get two accidental damages/incidents for the life of the warranty at reduced cost.

If you have Apple Care +, you pay a reduced price for screen replacement.

Read here: AppleCare+ - iPhone - Apple