Right now cm.infinityfreeapp.com does not appear to belong to any account, if you add it back to your hosting account you should be able to then park crowmarianne.com to it. You’ll need to update the settings in WordPress to the new URL, as a WordPress installation only supports one URL configuration by default:
Parking a subdomain is not very well supported however, it might be better to move the WordPress installation to the new blog.crowmarianne.com subdomain by following WordPress’ guide: