Official Shopify dns page:
|point A-record (IP address) to 18.104.22.168|
|THREE OR MORE LEVELS
(E.G. WWW.MYWEBSITE.COM OR BLOG.MYWEBSITE.COM)
“www.YourStoreName.com” is the name of your shopify store, you get this from their side.
On the Dreamhost Side:
Go to your Manage Domains Page and make sure the domain is DNS only. If you have hosting on the domain, use the “remove” button under the “web hosting” column:
Once the domain is dns only, click the dns link under your domain name and add these records:
Custom DNS Options:
Name: subdomain, leave blank for naked/root domain
Type: type of dns record, such as A record, Cname, TXT
Settings Needed for this setup:
Name: leave blank for naked/root domain
Note: This guide has been created to help simplify setting your domain up. The service you are pointing your domain to, DNS can/might has changed. Always check the hosts official page to verify the records.