Hi there,
It looks like the domain name hansonartindustries.com was registered through Register.com on March 17, 2013. If you registered the domain then, you'll need to change your nameservers to the following:
NS1.WORDPRESS.COM
NS2.WORDPRESS.COM
NS3.WORDPRESS.COM
If you're not sure how, you'll need to contact your registrar, Register.com, for assistance.
Please note it may take up to 48 hours for the domain nameserver changes to take effect. Once they've updated, you can set your primary domain to your custom domain by going to Store -> Domains and clicking the button next to the domain and clicking the "update primary domain" button.
Let me know if you have any questions.