Move child gameobject in x axis (Lerp)

Hello Everyone,

I have a player script attached to P1(gameobject).
I have a sprite mask as a child in P1health(gameobject).

in my player script attached to P1, I have current health and max health so i am creating a percentage upon each hit. The problem is I am trying to move the sprite mask when my percentage is changing. I have searched everywhere but I am not able to solve this. For example:

Initial position(x value) of sprite mask is 9.1 (full health)
final position(x value) of sprite mask is 1.4 (zero health)

I am trying to move the sprite bar as the percentage is going down between these 2 values mentioned above.

I hope someone can help me.
Kind regards,

Can any one help me? Thanks Again.