On basic block, draw the new neckline and the waist cut on both front and back. Taper also the skirt at knee from side seam.
On front, widen the shoulder dart by 1cm at the new neckline to make it tighter to upper chest. Shape the waist dart at underbust level to fit the bodice to the ribcage. For the same purpose, shape the bodice side seams slightly inward and shape center back.