To point your subdomain at your ecommerce package, please do the following:
In the Domain names section, select the relevant domain name in the drop-down list and click on the Manage button.
Click on the Manage DNS option.
Click on the Advanced DNS tab.
Create a new record with the following information:
Hostname: This should be the subdomain that you want associated with your e-commerce package i.e. www or shop.
Type: Select A from the drop down box.
Destination: Enter 18.104.22.168.
Click on the Add + button to save your changes.
Please note: It will take between 24 - 48 hours for the new DNS records to become active.