A hospital's biomedical repair shop uses a $6-$week periodic system to maintain the inventory on the blood pressure cuff repair parts. They use an average of $60$ adult arm cuffs with a standard deviation of $8$ cuffs every six weeks. Cuffs aren't the most critical item they carry, but the manager would like to limit the probability of a stock$-$out to $2\mathrm{.}5\%$ of the time. What should their restocking level be$?($You can round up$.)$

Group of answer choices

$71$ cuffs

$70$ cuffs

$68$ cuffs

$76$ cuffs