Despite their similar and sometimes confusing acronyms and their overall purpose of allowing tax-free reimbursement of various types of medical expenses, health savings accounts (HSAs) and health reimbursement arrangements (HRAs) are quite different when you get down to the details.
A full rotation of Pluto takes 6 Earth days, 9 hours, and some minutes; so the day part should be about half that amount (3 days and 5 hours), at least on average.
And the Sun, Earth and Pluto are lined up in a perfect line. The distance would be about 4.2 billion km. At their most distant, Earth would be at its furthest at the opposite side of the Sun from Pluto. So Earth is between 4.2 and 7.5 billion km from Pluto.