Create names as mentioned below in NAME MANAGER for SALES and DATE
DATE: =OFFSET('Scroll Bar Chart'!$A$2,,,'Scroll Bar Chart'!$L$8)
SALES: =OFFSET('Scroll Bar Chart'!$B$2,,,'Scroll Bar Chart'!$L$8)
Insert SCROLL BAR from FORM CONTROLS
Right click, select FORMAT CONTROL
Link L8 cell
Object of L8 cells is it denotes about the number of data items to be displayed on chart. It is represents height in OFFSET function which was used while defining name
Mention the names while defining the data range in SELECT DATA