the minimum passing mark/score; the score regarded as passing.
試験の及第点は60点だ。
The passing score for the exam is 60 points.
彼は及第点ぎりぎりで合格した。
He passed by barely reaching the passing mark.
及第点を下回ると再試験になる。
If you fall below the passing mark you'll have to retake the exam.