What TOEFL score do you need for Cal Poly Humboldt?

The page says Humboldt does not use the MyBest score, only the test date score. Scores may be no older than two years from the application term start date. Copies of results can be used to make an offer, but official results must arrive from the testing organisation before you can begin study.

For comparison, the same page sets IELTS at 6.0 for undergraduates and 6.5 for graduates.

The conditional admission page says undergraduate applicants who meet the academic requirements but not the English requirement may be admitted to a partner language school with a conditional admission letter to Humboldt. They study there until they pass the programme or reach an accepted score, then apply for the next available session.

Requirements vary by programme and change between admissions cycles. The score that binds you is the one on your Humboldt programme page and in your offer letter, so check it there before you book a test.