z value

Associated service level

$1\mathrm{.}28$

$90\%$

$1\mathrm{.}65$

$95\%$

$2\mathrm{.}05$

$98\%$

$2\mathrm{.}33$

$99\%$

$3\mathrm{.}08$

$99\mathrm{.}9\%$

That's the extra info added for the question.