In order to change the domain name registration pricing setting for customer in Enom one need to perform below mentioned steps:
1. Login into Enom admin account.
2. Click on My account. Under Account settings option, go to the 4th Tab "Domain Pricing".
3. It will show options by number of registration years like this : TLDs (1 Year) | TLDs (2 Year) | TLDs (5 Year) | TLDs (10 Year) | Premium Domains
3. Apply the require prices according to TLD domains.
4. Click on save changes.