revmabrynauta04 on "pointing domain's A-name to Tumblr"

Hi!
I am trying to link my WordPress.com blog to Tumblr. I get an error message that reads, "This domain's A-record is not pointing to Tumblr. It is currently set to “72.233.69.6”. Please change the A-record to: 66.6.44.4." Tumblr is telling me that I don't need to update my domain's nameservers. How do I get this to work? Thanks in advance!
Sincerely,
Angie Mabry-Nauta