Yes, BREATHED is a Scrabble word!

Letter values in Scrabble US: B 3, R 1, E 1, A 1, T 1, H 4, E 1, D 2.

Is it a valid word?

BREATHED is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

draw air into, and expel out of, the lungs
be alive
impart as if by breathing
allow the passage of air through
utter or tell
manifest or evince
take a short break from one's activities in order to relax
reach full flavor by absorbing air and being let to stand after having been uncorked
expel (gases or odors)

Also: take a breath, catch one's breath, take a breather, pass off.