To set DNS Records, you must provide a Hostname, Record Type, and Address.  Pointing your website to a specific server requires an A Record. 

If you want http://yourwebsite.com to point to the IP address 123.45.67.8, set the Hostname to @, Record Type to A, and Address to 123.45.67.8. 

Of course, 123.45.67.8 is an example IP address.  You should get the actual IP address from your hosting company.

If you want any other subdomain (a subdomain is the portion of your site that comes directly before the domain name: subdomain.yourwebsite.com) to point to the same IP address, set the Hostname to *, Record Type to A, and Address to 123.45.67.8.

If you want a specific subdomain (For example yourstore.yourwebsite.com) to point to the same or different IP address, set the Hostname to yourstore, Record Type to A, and Address to the IP address provided by your hosting company for this subdomain.