The daily demand for a product is Normally distributed with mean $100$ units per day and standard deviation $25$ units. The lead time of delivery of the product is $5$ days. The manager changed the review policy from a continuous review policy to a base stock $($periodic$)$ review policy, where the manager reviews the inventory every $10$ days. The service level is $95\%($z$\_0\mathrm{.}95=1\mathrm{.}64).$ What is the increase in safety stock due to the change in review policy? $($rounded to the nearest integer$)$