Ruling on changing the intention of Hajj from ifrad to tamattu'

Question:
He came to Mecca intending ifrad, performed the arrival tawaf, and performed sa'y, having brought the sa'y forward. After bringing the sa'y forward, he said: Why don't I change it to 'Umrah and perform tamattu'? Is that permissible for him, even though he had intended ifrad?

Answer:
This is the better course. He should shorten his hair and exit the state of ihram.
Q: Meaning: Is that permissible for him?
A: Yes, with the intention of 'Umrah.