Hi Tamalika,
If you have AC_NewParent in Disable Provisioning Policy then it will execute Update Provisioning Policy as well, as you are updating an attribute. So AC_NewParent in Disable policy will be override with Update Policy.
You can use Native Rule (Connector After Modify) to move user to different OU when there is a change in country.
(or)
Before Provisioning Rule.
– Krish